We've decided to use some kind of loose RACI model to organize teams. The roles are, roughly

Responsible - The person Responsible for ensuring that the team completes its objective. Plans times, organizes meetings, nags, nags, nags. This should generally be one person. This person has a key.

Assists or Accountable - One or more people accountable for task completion. These may or may not include the Responsible person. The Responsible person should add people here, for informational purposes, as teams coalesce.

Consulted - People who should be involved in major decisions, but are not part of the effort. For example, this might include Mitch for the circuit hacking benches - he's traveling, but should be a part of the work.

What should I do if I want to help? Add your name to the Volunteer List and subscribe to the Build list. Volunteer for specific teams as requests go out, and the Responsible person will add you. If you want to be a Responsible person, contact the Build list.